fzu 1909 An Equation(水题）

题目链接：fzu 1909 An Equation

典型的签到题。

#include <stdio.h>#include <string.h>bool judge(int *a, int sum) {for (int i = 0; i < 4; i++) {for (int j = i + 1; j < 4; j++)if (sum == (a[i] + a[j]) * 2) return true;}return false;}int main () {int cas, a[4];scanf("%d", &cas);for (int i = 1; i <= cas; i++) {int sum = 0;for (int j = 0; j < 4; j++) {scanf("%d", &a[j]);sum += a[j];}printf("Case %d: %s\n", i, judge(a, sum) ? "Yes" : "No");}return 0;}